Transparent film, method for using the same, and touch panel
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United States of America Patent
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Jan 9, 2018
Issued Date -
N/A
app pub date -
Oct 17, 2013
filing date -
Oct 17, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A transparent film for a display is provided. The transparent film enables smooth writing in input operation using a pen-input touch panel, like writing on paper with a pencil. The transparent film comprises a transparent substrate film and a coat layer on at least one side of the transparent substrate film. The total light transmittance of the transparent film in accordance with JIS K7136 is adjusted to not lower than 85%, and the surface of the coat layer is adjusted to a maximum height of rolling circle waviness profile (WEM) of not less than 15 μm in accordance with JIS B0610. The transparent film is disposed at the outermost side of a display in a pen-input touch panel. The coat layer may contain a particle and a binder component. The particle may have an average particle size of about 1 to 5 times as large as the thickness of the coat layer. The binder component may further contain a thermoplastic elastomer.
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